1. Paints, Coatings & Adhesives

• Curing Agent : In the coatings industry, OPD is utilized to enhance the performance of epoxy-based formulations. Its incorporation leads to coatings with superior adhesion, hardness, and resistance to environmental factors. These properties make OPD-cured coatings suitable for protective applications on metal surfaces and in harsh environments.
• Corrosion Inhibitor: o-Phenylenediamine (OPD) is an aromatic diamine widely utilized in the paints, coatings, and adhesives industries, primarily for its corrosion-inhibiting properties. Its chemical structure allows it to interact effectively with metal surfaces, forming protective layers that enhance the durability and longevity of various products.

2. Personal Care

• Hair Dyes: o-Phenylenediamine is widely used in hair coloring products, particularly in permanent dyes, where it functions as a dye precursor and helps develop color upon oxidation.
• Skin Care Products: In limited contexts, it may be used for its antioxidant properties, although its use in personal care products is regulated due to safety concerns.

3. Agrochemicals

• Fertilizer Coatings: It can be used in the production of coated fertilizers, helping to control the release of nutrients and enhance plant uptake.
• Herbicide Development: As an intermediate, it plays a role in developing selective herbicides that target specific weeds while minimizing crop damage.

4. Fabric Solutions

• Dye intermediate: Used as a building block in the synthesis of azo dyes and disperse dyes for synthetic fibers like polyester and nylon.Contributes to deep, rich color tones (browns, blacks).Helps in modifying dye properties such as solubility and lightfastness.

5. Polymers & Resins

• Curing Agents & Crosslinkers : o-PD serves as a curing agent in epoxy resin formulations, contributing to the development of materials with improved strength and durability. In polyurethane systems, o-PD functions as a crosslinker, facilitating the formation of three-dimensional networks that enhance the material's performance characteristics.